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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 871 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.32 + 45 =
  2. 2.36 + 37 =
  3. 3.27 + 13 =
  4. 4.59 + 36 =
  5. 5.31 + 72 =
  6. 6.32 + 39 =
  7. 7.23 + 12 =
  8. 8.32 + 13 =
  9. 9.82 + 25 =
  10. 10.76 + 31 =
  11. 11.33 + 32 =
  12. 12.44 + 24 =
  13. 13.71 + 31 =
  14. 14.37 + 33 =
  15. 15.59 + 28 =
  16. 16.82 + 88 =
  17. 17.72 + 81 =
  18. 18.72 + 82 =
  19. 19.28 + 75 =
  20. 20.42 + 55 =
  21. 21.30 + 42 =
  22. 22.28 + 21 =
  23. 23.24 + 34 =
  24. 24.86 + 32 =
  25. 25.71 + 24 =
  26. 26.74 + 61 =
  27. 27.32 + 82 =
  28. 28.63 + 63 =
  29. 29.54 + 48 =
  30. 30.44 + 32 =
  31. 31.36 + 28 =
  32. 32.89 + 24 =
  33. 33.54 + 59 =
  34. 34.57 + 29 =
  35. 35.26 + 59 =
  36. 36.24 + 19 =
  37. 37.88 + 14 =
  38. 38.72 + 14 =
  39. 39.85 + 34 =
  40. 40.62 + 18 =

Answer key

  1. 77
  2. 73
  3. 40
  4. 95
  5. 103
  6. 71
  7. 35
  8. 45
  9. 107
  10. 107
  11. 65
  12. 68
  13. 102
  14. 70
  15. 87
  16. 170
  17. 153
  18. 154
  19. 103
  20. 97
  21. 72
  22. 49
  23. 58
  24. 118
  25. 95
  26. 135
  27. 114
  28. 126
  29. 102
  30. 76
  31. 64
  32. 113
  33. 113
  34. 86
  35. 85
  36. 43
  37. 102
  38. 86
  39. 119
  40. 80

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